Leaf and Petiole Anatomy of Viburnum opulus L. (Adoxaceae)

Abstract

The genus Viburnum L. comprises with four species in Turkey. The Viburnum species are known as “gilaburu, giraoğlu, giligili, dağdağan, dağdığan, geleboru, gilabada, gildar” in Turkey. In this study, the leaf and petiole anatomy of V. opulus L., are described in detail. Vascular bundle is collateral type. Leaves are bifacial and hipostomatic. There are rare eglandular trichomes on lower epidermis. Both upper and lower epidermises are covered with thick cuticle and cells are single layered. Midrib has 1-2 layered collenchyma and 4-5 layered parenchyma. Druse crystals occur in parenchyma cells. The mesophyll is consisted of 1-2 layer palisade parenchyma and 2-3 layer spongy parenchyma. Anomocytic stomata are surrounded by 4-5 ordinary epidermal cells. There are not any trichomes on the cross section of the petiole. Petiole has a total of three vascular bundles, with a big arc-shape bundle in the middle. In each corner, there are two small arc-shape bundles. Arc-shaped vascular bundles are surrounded by parenchymatous cells consisted of druses.

Keywords

• Viburnum opulus,Adoxaceae,Anatomy,Leaf,Petiole

Leaf and Petiole Anatomy of Viburnum opulus L. (Adoxaceae)

Abstract

Viburnum L. cinsi Türkiye’de dört tür ile temsil edilmektedir. Ülkemizde “gilaburu, giraoğlu, giligili, dağdağan, dağdığan, geleboru, gilabada, gildar” isimleri ile tanınır. Bu çalışmada, V. opulus L. türünün yaprak ve petiol anatomisi ayrıntılı olarak tanımlanmıştır. Vasküler demet kollateral tiptedir. Yapraklar bifasiyal ve hipostomatiktir. Alt epidermiste örtü tüyleri seyrektir. Üst ve alt epidermis hücrelerinin üstünde kalın bir kutikula tabakası vardır ve hücreleri tek sıralıdır. Orta damarda, epidermanın altında sırasıyla 1-2 sıralı kollenkima ve 4-5 sıralı parankima hücreleri bulunur. Parankima hücreleri druz kristalleri içerir. Mezofil tabakası 1-2 sıralı palizat parankiması ve 2-3 sıralı sünger parankimasından oluşur. Anomositik stomalar 4-5 basit epidermal hücre ile çevrelenmiştir. Yaprak sapı enine kesitinde tüye rastlanmamıştır. Yaprak sapında üç iletim demeti bulunmaktadır. Ortadaki iletim demeti büyük ve yay şeklindedir. Her köşede ise iki küçük yaysı iletim demeti bulunmaktadır. Yaysı iletim demetleri druz kristalleri içeren parankimatik hücrelerle çevrilmiştir.

Keywords

• Viburnum opulus,Anatomi,Yaprak,Adoxaceae,Petiol

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